Power metrics - conversions

[eolson124]

Is there a converter/calculator that will help me calculate certain power metrics. For example, how many kilojoules are expended by a 100 kilogram rider (including bike) who rides a 10% incline for 15 kilometers at a certain rate (either pushing a constant 250 watts or keeping a constant speed of 10 kilometers per hour)?

I'm training for this year's Mt. Washington ride. After much research, I plan to gear my bike at 1:1 (i.e., 50/34 and 11/34). I'm confident in my legs and lungs, and want to focus on my powermeter (including watt rate, aggregate kilojoules, and TSS) and dropping ten pounds.

I welcome your comments. EWO

[unterhausen]

did you look at any bicycle wattage calculators?

[kppolich]

Chain line is big for reducing friction. Nice starter video here.
https://youtu.be/FBOjDrjGJDA?t=398

Use that paired with your ideal gearing and get ready to roll..

[echappist]

Is there a converter/calculator that will help me calculate certain power metrics. For example, how many kilojoules are expended by a 100 kilogram rider (including bike) who rides a 10% incline for 15 kilometers at a certain rate (either pushing a constant 250 watts or keeping a constant speed of 10 kilometers per hour)?

I'm training for this year's Mt. Washington ride. After much research, I plan to gear my bike at 1:1 (i.e., 50/34 and 11/34). I'm confident in my legs and lungs, and want to focus on my powermeter (including watt rate, aggregate kilojoules, and TSS) and dropping ten pounds.

I welcome your comments. EWO

Energy = power * time

so 250 watts (aka joule/sec) * time (in seconds) = Joules expended

1 kJ generated ~ 1 kCal expended (the body being ~21-25% efficient, and 1 kCal = 4.18 kJ)

[Andy sti]

Pretty much every bike computer will give you those stats. I assume you have a power meter since you're mentioning watts.

[BdaGhisallo]

http://bikecalculator.com/

https://www.mne.psu.edu/simpson/courses/me240/bikecalc1.htm

[Mikej]

Efficiency (known) of the human engine supplying power is the variable that no formula is going to incorporate.

[Ti Designs]

Efficiency (known) of the human engine supplying power is the variable that no formula is going to incorporate.

If you talk about efficiency of the rider, you have to talk about pedaling technique. Nobody does that, they just talk about watts.

[MattTuck]

If you talk about efficiency of the rider, you have to talk about pedaling technique. Nobody does that, they just talk about watts.

Well, I wouldn't say NOBODY, Ed.... I can think of at least one person who is quite passionate about pedaling technique. :banana: